Can anybody give ideas on how to remove a seized aluminium water casting from a cast iron waterpump please? This is held by 3 studs and not bolts which makes it difficult to tap to release the corrosion.

Hi
If it is still basically altogether and running, how about building pressure in the system by running the engine?
Or using a spare rad cap with a tyre valve fastened through a hole in it and a tyre pump to pressurize the system_________________Bristols should always come in pairs.

The waterpump has been removed and to get to the thermostat I have to remove the aluminium casting which shows that it is heavily corroded. I think that the best thing is to heat the aluminium casting and try to tap it may be it will move.

The waterpump has been removed and to get to the thermostat I have to remove the aluminium casting which shows that it is heavily corroded. I think that the best thing is to heat the aluminium casting and try to tap it may be it will move.